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Aldol condensation
Question#1
Base catalysed aldol condensation occurs with [IIT-JEE 1991]
Question#2
In the presence of a dilute base C6 H5CHO and CH 3CHO react together to give a product. The product is [MP PET 1994]
Question#3
Which of the following would undergo aldol condensation [MP PMT 1986; BHU 1995]
CH3-CH2 -CHO aldehydes having \( \alpha\)- H atom can participate in aldol condensation. The H - atom attached to \( \alpha\) carbon atom are called \( \alpha\) -hydrogen.
Question#4
Propanal on treatment with dilute sodium hydroxide forms [Kerala CET 2000]
Question#5
CH3CHO react with aqueous NaOH solution to form [MP PMT 1992]
This reaction is aldol condensation
2 \( \xrightarrow{dil. NaOH} \)
Question#6
CH3CHO react with aqueous NaOH solution to form [MP PMT 1992]
This reaction is aldol condensation
2 \( \xrightarrow{dil. NaOH} \)
Question#7
When two molecules of acetaldehyde condense in the presence of dilute alkali, it forms [Bihar MEE 1996]
Question#8
When two molecules of acetaldehyde condense in the presence of dilute alkali, it forms [Bihar MEE 1996]
Question#9
Aldol condensation involving CH3CHO + CH3CHO gives the product [DPMT 1996]
Question#10
Aldol condensation will not take place in [CBSE PMT 1996, 99; RPMT 1999; CPMT 1988, 04]
In HCHO because \( \alpha \) -Hydrogen atom is absent.
Question#11
Aromatic aldehydes undergo disproportionation in presence of sodium or potassium hydroxide to give corresponding alcohol and acid. The reaction is known as [MNR 1987]
Question#12
Aldol condensation of acetaldehyde involves the formation of which of the following intermediate [Pb. CET 1986]
Question#13
Which of the following will not undergo aldol condensation [IIT 1998]
)Deuterium behaves like H and hence trideuteroacetaldehyde also undergoes aldol condensation but benzaldehyde does not since it has no Alpha-hydrogen.
Question#14
Acetaldehyde when treated with dilute NaOH gives [EAMCET 1998]
Question#15
Which of the following compound will undergo self aldol condensation in the presence of cold dilute alkali [CBSE PMT 1994]
Question#16
Aldol condensation will not be observed in [GATE 2001]
Chloral , CCl 3CHO has no alpha-hydrogen atom and hence does not undergo aldol condensation.
Question#17
Which of the following gives aldol condensation reaction [CPMT 2001]
Although both CH3CH2-CO-CH3 and (CH3 )3 C-CO-CH3 contain alpha-hydrogen, yet (CH3 )3 C-CO-CH3 does not undergo Aldol condensation due to steric hindrance.
Question#18
Treatment of propionaldehyde with dil.NaOH solution gives NUMS2016
Question#19
Which of the following will not undergo aldol condensation ? NUMS2016